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![Harken 40mm Carbo Air Double Fixed Block w/Becket [2643]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79740XL.jpg?v=1591395617 "Harken 40mm Carbo Air Double Fixed Block w/Becket [2643]")
![Harken 40mm Carbo Air Triple Swivel Block [2640]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79736XL.jpg?v=1591395584 "Harken 40mm Carbo Air Triple Swivel Block [2640]")
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Ships within 48 hours · Estimated delivery Jun 17 - Jun 22
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Description
Harken 40mm Carbo Air Triple Swivel Block [2640]40mm Carbo Air Triple Swivel Block Low friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave (mm)40 mm Sheave (in)1 9 16 in Maximum line (mm)10 mm Maximum line (in)3 8 in Maximum working load (kg)660 kg Maximum working load (lb)1455 lb Quick Guide (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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![Raymarine Right Angle RayNet to RayNet - 10M [A80512]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79181XL.jpg?v=1591393476 "Raymarine Right Angle RayNet to RayNet - 10M [A80512]")
4.8 ★★★★★
Based on 593 reviews
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Product Reviews
★★★★★ 5
Great value
Size: 12, Color: All Black
I have 3 pairs of these shoes. They are super comfy. The price is amazing for a shoe so well built. They are light weight look really nice on. Buy them, well worth the money.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Worth the price
Size: 10, Color: White
Stylish and comfortable
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Reviewed in the United States on May 25, 2026
★★★★★ 1
Avoid These Shoes
Size: 10, Color: Grey
The pair I received (gray) was not represented well in their photos. Mine had a lime green logo which looks silly. They also bunch up very badly when you pull the laces which looks ridiculous. Cheap feeling and look bad when tied. Sending back
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Great fit, great looking
Size: 11, Color: Red
Great looking, great fit, 5 Stars
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Great pair of shoes
Size: 10, Color: Burgundy
I was a bit concerned that these shoes would be a bit large because I normally wear a size 9 1/2 and these are a size 10. But they fit perfectly. They are very light and comfortable. 👍
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Reviewed in the United States on March 10, 2026
